Thread-rolling machine.



R. L. WILOOX.

THREAD ROLLING MACHINE.

APPLICATION FILED DEC. 29, 1913. 1,1QALQ9 1 Patented July 21, 1914.

2 SHEETSSHBET 1.

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MTNESSES I llfrvro M a WZMR R. L. WILGOX.

THREAD ROLLING MAGHINE. APPLICATION FILED DEG.29,1913.

1, 1 04,09 1 Patented July 21, 1914.

2 SHEETS-SHEET 2.

151 TBIX MTNESSES.

I numerals of reference designate like parts UNITED STATES PATENT onnron.

WATERIBURY FARREL FOUNDRY AND MACHINE COMPANY, OF WATERBURY, CONNECTICUT, A. CORPORATION OF CONNECTICUT.

THREAD-ROLLING MACHINE Specification of Letters Patent.

To all whom it may concern:

Be it known that I, RICHARD LESTER WIL- oox, a citizen of the United States, residing at Waterbury, in the .county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Thread-Rolling Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to thread rolling machines, and has for its object, among other things, to so arrange the relative position of the dies and feed chute that they will lie substantially parallel with each other; and to provide means for advancing the blank from said chute to the position where the thread rolling operation begins, which means will insure, if required, the holding of the blank in such position as to' out the thread as close to the head as is practicably possible.

To these, and other ends, my invention consists in the thread rolling machine, having certain details of construction and combinations of parts, as will be hereinafter described, and more particularly pointed out in the claims.

Referring to the drawings, in which like in the several figures; Figure 1 is a view of the mechanism adjacent to the thread rolling dies as is essential to an understanding of this invention; Fig. 2 is a plan view of a portion of the mechanism shown in Fig. 1; Fig. 3 is a perspective view of. the guide block and bracket; Fig. 4: is a side view thereof with one. of the guide plates removed; Fig. 5 is a perspective view of a portion of the guide plates and the mechanism adjacent thereto; Fig. 6 is a side elevation of the pusher and spring finger mechanism with the parts in the relative position occupied by them as they are about to engage the blank; Fig. 7 is a view of the same parts illustrating their relative positions when the blank has engaged the threading dies; Fig. 8 is a sectional view of the same parts taken upon line AB of Flgs. 6 and and Fig. 9 is a perspective view of one of the guide plates, showing the square ended lip 28 as used when the thread is not cut close to the head of the blank.

In the thread rolling machines he1eto-' fore made, the threading dies are mounted so that the threading faces thereon lie in a substantially vertical plane and at an angle to the blanks as they gravitate in the feed chute toward the die. Before these blanks can be delivered to the dies, they must be brought into a position wherein the axes thereof are substantially parallel with the face thereof. This requires that the blanks be moved from the po'sitionoccupied by them while in the chute, i. 6. with their axes at an angle between the horizontal and vertical to a position wherein the axis of the blank is parallel to theface of the die,

2'. (2., vertical. This is usually accomplished by mechanism known as a separator or cut-off. v

In my improved machine the dies are placed so that the threading faces thereof are substantially, parallel with the axes .of the blanks while in the chute, which are delivered to the dies without changing the angle thereof. With this arrangement of the parts it is not necessary to use a separator, cut-oil", or similar mechanism, thereby accomplishing the same work with less operative parts, gravity being suificient. to

Patented July 21, 1914.

carry the blanks to the dies without change of their angle of inclination. A very desirable resu-lt of this relation of the elements of my invention is the fact that extremely.

. The means by which the above, and other features of my invention are accomplished,

will be more particularly ascertained from the followingdescriptlon of its several parts and operation.

In the drawings, the numeral 1 designates the frame of the machine, within which a slide 2 is mounted, and reciprocated by mechanism not shown, being held in position by a-cap 3 secured to the frame by the bolt A. All of .the .parts just described are of the usual type and the details thereof are not material to this invention.

Secured in the slide by a cap 5, or other preferred means, is the die 6 that is held against endwise movement therein b a clamp 8 secured by the bolt 7. This die is mounted so that the face thereof is at an angle between the horizontal and the vertical. Within the frame 1- is the adjustable die block 9, having the die 10 therein, that lies parallel with the die 6. The die block 9 is adjustable in the frame toward and open space 15, and the head resting upon tinuation of the cover 16, thereby f same-position of theblock is sho by the top of the plates, lie substantially parallel with the dies' 6 and 10. A cover 16, either hinged or otherwise secured, as desired, is arranged in such relative position with the plates 14 that there is just suflicient space therebetween for the head of the blank to pass thereunder.

Adjustable upon one of the chute plates 14, or to any other fixed part of the machine, is a guide block 17 to which the bracket 19 is adjustably secured by the bolt 18. Upon said guide block the inner plate 20 and the outer plate 21 are adjustably secured by the screws 22. Each of these plates has an inwardly projecting lip 23 near the bottom edge thereof that terminates at one end in the inclined face 24:. Said plates are secured so that there is an open space between the lips 23 of substantially the same width 'as that between the chute plates 14, the inner ends of which are in the same line as the inside face of the lip 23-upon the inner plate 20 see Fig. 5). The open space'15 between t e plates 14:, and the open'space 25 between the lips 23 connect with each other at substantially a right an le.

Mounted within the bracket 19 is the stop block 26, having a shank 27 thereon that is surrounded by a coil spring 28 between said bracket and block, and upon the outer end of which is threaded the thumb nut 29. The action of the spring 28 tends to hold the block 26 in a position away from the bracket 19, and its relative position therewith is determined by the nut 29. This block serves a double purpose. In the position sh'ownm Fig. 1 the lower edge thereof forms a cpni an extension thereof that holds the blan in proper alinement until it enters the open space 25 between the lips 23. In Fig. a this blank. Dunn and described.

broken lines. By rotation of the nut 29, the block 26 is moved to a position wherein its lower edge projects below the underside of the chute cover 16, thus forming a stop and preventing the blanks from leaving the chute.

The mechanism for advancing the blanks from the end of the chute to the threading dies, comprises a transfer slide 30 that has a reciprocatory motion within the frame 1, and to which is secured a transfer finger 31 by a screw 32 and a stud 33. A plate 34 is secured to said slide by the screw 35, and upon which rests the transfer finger 31. Pivotally mounted upon the stud'33 is the spring finger 36, having a notch 37 in its outer end. This spring finger is moved upon its pivot mounting in one direction by a spring 38 that is fixed within the block 34 and bears against the underside of said finger, and in the opposite direction by a screw 39, threaded into a fixed part in the path of movement of said finger during the reciprocation of the slide 30. I

In operation, the blanks are deposited in the chute with their shanks in the open space 15 between the chute plates 14:, with their heads resting upon the top of said plates, being slidably held therein by the chute cover 16. They gravitate downwardly between these chute plates with their axes substantially parallel with the face of the dies 6 and 10, and atthe lower end drop into the open space 25 between the lips 23. From this position the blanks are advanced to the point where they are engaged by the dies, in a path at substantially a right angle to their path of movement while in the chute, by the transfer finger 31, which engages the blank and moves it-through the opening 25 with its head resting upon the top of the lips 23. The sprin finger 36 during this travel rests upon t e head of the blank which is now inthe notch .37, the spring 38 exerting its pressure. so ,as to hold the underside of the head against the top of the lips 23. If the thread is not to .be cut close to the head, the blank rests with its head upon the lips 23 until it is engaged by the dies, but if the thread is to be cut close to the head, then the lips 23 are made with the inclined faces 24,:down which the blanks slide onto the top of the dies, bythe pressure of the spring finger 36 upon the head of the the return movement of the slide 30 the on of the finger 36 engages the underside of the fixed screw 31 and raises the outer notched end so as to admit other blank in front thereof. Within the scope of the appended claims,

the details of my mechanism may bemodifled without materially departing from the invention, and I do not therefore limit myself to the exact construction herein shown Having described my invention, what I claim as new and desire to secure by Letters Patent, is:-

1. In a thread rolling machine; a stationary die; and a movable die, each of said dies being mounted so thatthe thread rolling faces thereof lie at an angle between the horizontal and vertical.

2. In a thread rolling machine, the combination with a stationary die; of a movable die; and a feed chute for conducting blanks to said dies, the threading face of said dies lying at an angle between the horizontal and vertical and in such relation to said feed chute that said thread rolling faces are substantially parallel with the axis of the blanks while in said feed chute.

3. In a thread rolling machine, the combination with a stationary die; of a movable die, the threading faces of said dies being at an angle between the horizontal and vertical; a feed chutefor conveying blanks to said dies, arranged so that the blanks are delivered therefrom to a position in line with the dies without the assistance of interposed mechanism.

4. In a thread rolling machine, the combination with a stationary die; of a fixed die, the threading faces of which are at an angle between the horizontal and vertical; means for delivering blanks to said dies, said means comprising a feed chute extending at substantially a right angle to the threading faces of said dies, and through which the blanks travel to said dies without change of their angleof inclination therein.

5. In a thread rolling machine, the combination with a stationary die; of a movable die; a feed'chute for conducting blanks in line with said dies; means for advancing said blanks substantially parallel with the face of said dies, said means comprising a finger engaging said blank; and means for preventing the movement. of said blanks away from said dies, said means comprising a spring finnier having contact with'the head of said bla 6. In a thread rolling machine, the combi nation with a stationary die; of a movable die; a 'feed chute for conducting blanks to said dies; means for supportin blanks substantially parallel with the' ace of said dies comprising a bracket; plates connected therewith, having inwardly projecting lips upon the lower edge thereof; means for ad- .die; a feed chutefor conductin .stantially parallel with the vancing said blanks while in said supporting means, comprising a reciprocating finger contacting with the shank of said blank; and a second finger having contact with the head thereof.

7. In a thread rolling machine, the combination with a stationary die; of a movable blanks to said dies; means for supporting lanks subace of said dies comprisi a bracket; plates connected therewith, having inwardly projecting lips upon the lower edge thereof, beveled at one end thereof; means for advancing said blanks while in said supporting means, comprising a reciprocating finger contacting with the shank of said blank; and 'a second. finger having contact with the head thereof.

8. In a thread rolling machine, the combination with a stationary die; of a movable die; a feed chutefor conducting blanks to said dies; means for supporting said blanks in a path substantially parallel with said dies, comprising a bracket having lipped plates thereon a reciprocatory finger contacting with said blank; a spring finger movable with the aforesaid finger having contact with the head of said blank; yielding means for actuating. said spring finger in one direction and positive means for actuating it in the opposite direction.

9 In a thread rolling machine, the combination with a stationary die; of a movable die; a feed chute for conducting) blanks to said dies; means for supportin lanks substantially parallel with the 'ace of said dies comprising a bracket; plates connected therewith, havmg inwardly projecting lips upon the lower ed e thereof; means for ad- 

